In June 2010, the Shirai sisters came together with fellow freelancer Kana to form the Triple Tails stable and began working most notably for SMASH. After Io left the stable the following year, Mio and Kana continued working together as the tag team Triple Tails.S. Shirai remained a freelancer until January 2014, when she signed a four-way contract with Ice Ribbon, Oz Academy, Pro Wrestling Wave and Union Pro.